﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;

namespace Xceed.Silverlight.Data
{
  internal class ExpansionStateCollection
  {
    public bool ContainsItems
    {
      get
      {
        return this.ContainsCollapsedItems || this.ContainsExpandedItems;
      }
    }

    public bool ContainsCollapsedItems
    {
      get
      {
        return ( m_collapsedItemsCollection.Count > 0 );
      }
    }

    public bool ContainsExpandedItems
    {
      get
      {
        return ( m_expandedItemsCollection.Count > 0 );
      }
    }

    public void AddExpandedItem( DataPath item )
    {
      if( !m_expandedItemsCollection.Contains( item ) )
      {
        m_expandedItemsCollection.Add( item );
        m_collapsedItemsCollection.Remove( item );
      }
    }

    public void AddCollapsedItem( DataPath item )
    {
      {
        if( !m_collapsedItemsCollection.Contains( item ) )
        {
          m_collapsedItemsCollection.Add( item );
          m_expandedItemsCollection.Remove( item );
        }
      }
    }

    public void RemoveExpandedItem( DataPath item )
    {
      m_expandedItemsCollection.Remove( item );
    }

    public void RemoveCollapsedItem( DataPath item )
    {
      m_collapsedItemsCollection.Remove( item );
    }

    public void Clear()
    {
      m_expandedItemsCollection.Clear();
      m_collapsedItemsCollection.Clear();
    }

    public bool IsExpanded( DataPath item )
    {
      return m_expandedItemsCollection.Contains( item );
    }

    public bool IsCollapsed( DataPath item )
    {
      return m_collapsedItemsCollection.Contains( item );
    }

    private List<DataPath> m_collapsedItemsCollection = new List<DataPath>();
    private List<DataPath> m_expandedItemsCollection = new List<DataPath>();
  }
}
